Gas-fired water heater



FIG. 1 is a front elevation view of the gas-fired water heater;

FIG. 2 is a side elevation view of the gas-fired water heater, the opposite side being a mirror image of that shown;

FIG. 3 is a rear elevation view of the gas-fired water heater;

FIG. 4 is a perspective view of the gas-fired water heater; and,

FIG. 5 is a top plan view of the gas-fired water heater. 

We claim the ornamental design for a gas-fired water heater, as shown and described. 